Process for the manufacture of colloidal substances in the form of small balls or grains



Patented Oct. 27, 1925.

UNITED STATES 1,559,126 PATENT basics.

ALBERT osaasorm, or nnamu-cnaanor'rmuae, wmnanu waenraa, or aaatm, i Damian saxom, or WIESBADEN, AND mar. ASKENABY, or zazaasauna, ena- MANY.

PROCESS FOR THE MANUFACTURE OF COLLOIDAI: SUBSTANCES IN THE TOM O l? SMALL BALLS OR GRAINS. I

No Drawing. Original application filed March 13, 1924, Serial No. 699,127. Dividedand thil'applieation filed January 7, 1925. Serial No. 1,080.- 7

To all whom it may concern: Y

Be it known that I, ALBERT OBaRsoHN, a citizen of Hungary, residing at 53 Pestalozzistrasse, Berlin- Charlotteuburg, Germany, and I, WILHELM IVAOHTEL, a citizen of Austria, residing at 61 Bambergerstrasse, Berlin, Germany, and I, DANIEL SAKOM, a citizen of Lithuania, residing at 13 Adolfsallee, Wiesbaden, Germany, and I, PAUL AsKENAsY,'a citizen of Germany, residing at 44 Kaiserallee, Karlsruhe, Baden, Germany, have jointly invented new and useful Improvements 'in Processes for the Manufacture of Colloidal Substances in the Form of 15 Small Balls or Grains, for which we have filed applications in Germany, October 2-,-

1922; Germany, October 11-, 1922; Germany,-January 27, 1923, of which the following is a specification.

This application which-is a divisional application from Serial Number 699,127 re lates to a process for producingcolloidal substances in the form of small balls or grains. When a solution of a colloidal substance, such a glue, elatine, or the like, is passed through a cooding bath composed of a liquid which does-not mix with the colloid, the resulting drops of the colloid form into 0 small balls or grains" which are re. idly solidified by theaction of the cooling ath. The rains so roduced ma then be remove and drie Glue in this form is very convenient both for use and for shipmentand it dries-more easil that in slab form and ismore readil me ted. In the following specification, t e terms glue or solutions 'of glue are to be understood to include all colloidal substances having the properties 40 of lue which it is or maybe considered deslrable to produce in granular form.

It has been roposed to use cooling baths of liquids whlch did not mix with or dissolve the drops during their solidificationf but such substances are usually expensive and sometimes offensive or oisonous in their nature. To avoid these disadvantages, the present invention proposes to drops through a cooling gas, to e iminate this difiiculty of separating the liquid from there is no loss of expensive reagents, and the globules are kept the globules forme ass the pure. By this processa cheap and simple preparation is made feasible.

In operation, the colloid is prepared in the form of a hot concentrated, preferably saturated, solution. This solution is sprayed in the form of -a shower of drops into a counter-current of. the gas. The solution may also be pumped or sprayed under pressure into a vessel contaimn compressed gas. By this means, the velocity of the fall of the drop is retarded, and the height of the fall maybe reduced, and the size of the, apparatus correspondingly diminished.

In case any of the cooling gas adheres to the globules, water, aqueous solutions or emulsions maybe used as a cleansing agent,

e cleans- 4 1. The process ofpreparing glue globules which consists in preparing a hot concen trated solution ofuglue,.-forming said solution intodro s by sprayin thesame under pressure, an passing sai drops into and through a gaseous cooling'agent under pres-' sure to retard the rate of passage of said drops through said agent.

2. The .process of producing glue globules which consists inpreparing a hot concentrated solution of glue, for-min said solution into drepsby sprayin un er ressure,

passing said dropsinto an throng a gaseous coolin agent under pressure to retard the rate 0 passage of" said 'drqps through said agent, and receiving said rops from said cooling agent in a liquid bath.

In testimony whereof vwehave signed our names to this specification.

ALBERT. OBERSOHN.

WILHELM 'WACHTEL. vDANIEL SAKOM.

PAUL ASKENASY. 

